FAQ's, Firmware, Warranty Information....
Please review all information regarding the DIR-857 at the link here:
DIR-857 (http://www.dlink.com/us/en/home-solutions/connect/routers/dir-857-dualband-hd-media-router)
(Note: If you've never been to the United States support site before, you'll be prompted to select the country, then this link will take you directly to the product page.)